Since this seems to be the "...on Mac OS X Hosts" topic area, you may not get your answer here.

I've also got Virtual box on a Kubuntu Linux installation that runs well. It has only 2GB of RAM though so that's no help. A quick search on the forums didn't turn up any >2GB RAM issues, but that doesn't mean that there aren't any.

I use my additional RAM more than I use an alternate OS on my primary machine so . . . it shouldn't be difficult to guess what I've done here.

Yes, the version 1.6.2 seems to have also solved the problem of my MacPro having too much memory (5 GB). I was able to start up the Win2K virtual machine that I had created under 1.5.n. I haven't stress tested VirtualBox in this situation, but the initial problem seems to have been overcome.

A RedHat 9 VB didn't automagically start up, but then I can't say that it was properly installed in the first place.